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Home/ Questions/Q 7588133
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Editorial Team
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Editorial Team
Asked: May 30, 20262026-05-30T19:50:53+00:00 2026-05-30T19:50:53+00:00

When I want to connect to MySQL by Entity framework (code first) I get

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When I want to connect to MySQL by Entity framework (code first) I get this error:

(22,12) : error 2019: Member Mapping specified is not valid. The type 'Edm.Byte[Nullable=False,DefaultValue=]' of member 'Permission' in type 'News.Models.Author' is not compatible with 'MySql.tinyint[Nullable=False,DefaultValue=]' of member 'Permission' in type 'CodeFirstDatabaseSchema.Author'.

The name of colum in db is Permission with tinyint datatype. and the below is my class.

   public class Author
    {
     ...
     public byte Permission { get; set; }
     ...
    }
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1 Answer

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  1. Editorial Team
    Editorial Team
    2026-05-30T19:50:54+00:00Added an answer on May 30, 2026 at 7:50 pm

    It’s fixed in Connector/Net 6.4.5 which is not out yet.

    http://bugs.mysql.com/bug.php?id=62135

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